Medina, S. (2010). Helping Around the World. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoMedina, Sarah. Helping Around the World. Oxford: Oxford University Press, 2010.
MLA引文Medina, Sarah. Helping Around the World. Oxford: Oxford University Press, 2010.
警告：这些引文格式不一定是100％准确.